TWI495246B - Resonant dc converter - Google Patents

Resonant dc converter Download PDF

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Publication number
TWI495246B
TWI495246B TW101139382A TW101139382A TWI495246B TW I495246 B TWI495246 B TW I495246B TW 101139382 A TW101139382 A TW 101139382A TW 101139382 A TW101139382 A TW 101139382A TW I495246 B TWI495246 B TW I495246B
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Taiwan
Prior art keywords
circuit
coupled
transformer
resonant
conversion circuit
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TW101139382A
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Chinese (zh)
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TW201417486A (en
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Ching Tsai Pan
Po Yen Chen
Ming Chieh Cheng
Ching Hsiang Cheng
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Nat Univ Tsing Hua
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Priority to TW101139382A priority Critical patent/TWI495246B/en
Priority to US13/684,779 priority patent/US20140112026A1/en
Publication of TW201417486A publication Critical patent/TW201417486A/en
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Publication of TWI495246B publication Critical patent/TWI495246B/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33571—Half-bridge at primary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/01—Resonant DC/DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/10—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode arranged for operation in series, e.g. for multiplication of voltage
    • H02M7/103—Containing passive elements (capacitively coupled) which are ordered in cascade on one source
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Description

諧振直流轉換器Resonant DC converter

本發明係有關於一種諧振直流轉換器，尤指涉及一種同時整合柔切技術與高電壓轉換比之直流轉換器，特別係指整合一變壓器並於其一次側結合全橋式或半橋式諧振直流轉換電路與電壓型自動電荷抽放電路（Auto Charge Pump Circuit），透過電路參數設計與LC共振電路作用，具有可變電路結構特性及主動開關柔切特性，並能透過調整電路參數而可控制電路操作於升壓與降壓工作模式者。
The invention relates to a resonant DC converter, in particular to a DC converter which integrates a flexible cutting technology with a high voltage conversion ratio, in particular to integrate a transformer and combines full bridge or half bridge resonance on its primary side. The DC conversion circuit and the voltage-type automatic charge pump circuit (Auto Charge Pump Circuit), through the circuit parameter design and the LC resonance circuit, have variable circuit structure characteristics and active switching soft-cut characteristics, and can be adjusted by adjusting circuit parameters. The control circuit operates in the boost and buck modes of operation.

一般來說，半橋式諧振直流轉換器通常使用於降壓應用場合，如第９圖所示之半橋式諧振直流轉換器電路，其主要係由兩個主動開關以50%之責任週期互補式驅動，盲時區域則被引入至兩開關元件轉態區間，而零電壓切換機制則係在此區間完成。諧振電路則係由電感L1 、電容C1 、變壓器之激磁電感Lm 以及由變壓器二次側反射之負載所構成，電容C1 負責阻擋直流電流以及諧振作用，並與電感L1 產生較高之諧振頻率，而與電感L1 及激磁電感Lm 產生較低之諧振頻率。
目前半橋式諧振直流轉換器為了降低零件成本與減少轉換器體積，常利用提高切換頻率來減少電容值與磁性元件之體積大小，以增加直流轉換器之功率密度，然而，在提升轉換電路之切換頻率之際，相對也增加開關元件之切換損失，同時亦增加電磁干擾（Electric Magnetic Interruption, EMI）問題。故，ㄧ般習用者係無法符合使用者於實際使用時之所需。

In general, half-bridge resonant DC converters are commonly used in buck applications, such as the half-bridge resonant DC converter circuit shown in Figure 9, which is mainly complemented by two active switches with a 50% duty cycle. Drive, the blind time zone is introduced into the transition range of the two switching components, and the zero voltage switching mechanism is completed in this interval. The resonant circuit is composed of an inductor L 1 , a capacitor C 1 , a magnetizing inductance L m of the transformer, and a load reflected by the secondary side of the transformer. The capacitor C 1 is responsible for blocking the direct current and the resonance, and is higher with the inductor L 1 . The resonant frequency produces a lower resonant frequency with the inductor L 1 and the magnetizing inductance L m .
In order to reduce the cost of parts and reduce the volume of the converter, the current half-bridge resonant DC converter often uses the increased switching frequency to reduce the capacitance value and the volume of the magnetic component to increase the power density of the DC converter. However, in the rise of the conversion circuit When the frequency is switched, the switching loss of the switching elements is relatively increased, and the electromagnetic interference (EMI) problem is also increased. Therefore, the user-like users cannot meet the needs of the user in actual use.

本發明之主要目的係在於，克服習知技藝所遭遇之上述問題並提供一種同時整合柔切技術與高電壓轉換比之直流轉換器，係整合一變壓器並於其一次側結合全橋式或半橋式諧振直流轉換電路與電壓型自動電荷抽放電路，透過電路參數設計與LC共振電路作用，具有可變電路結構特性及主動開關柔切特性，並能透過調整電路參數而可控制電路之工作模式為升壓模式或降壓模式之轉換器電路。
本發明之次要目的係在於，提供一種於變壓器二次側結合倍壓整流電路，以進一步提升輸出電壓轉換比及降低輸出電壓漣波，並進一步整合轉換器電路之開關元件與利用自動改變電路結構特性，以降低開關切換損失與提升電路轉換效率之轉換器電路。
本發明之另一目的係在於，提供一種具有低輸出電壓漣波，可避免使用大容值之電解電容而得以延長轉換器之使用壽命，以達到具有高功率密度、高電壓轉換比、低成本、低EMI干擾、低輸出電壓漣波、長壽命以及高轉換效率等目的之轉換器電路。
為達以上之目的，本發明係一種諧振直流轉換器，用於將一直流輸入電壓轉換為一直流輸出電壓，以為一負載供電。於一具體實施例中，本發明所提之半橋式諧振直流轉換器，其包括：
一前端轉換電路，係由一半橋式諧振直流轉換電路及一電壓型自動電荷抽放電路（Auto Charge Pump Circuit）所構成，其中，該半橋式諧振直流轉換電路設有自輸入側正電壓端與負電壓端分別連接第一主動開關元件與第二主動開關元件到第一電感之正電壓端，該第一電感之正電壓端係耦接至該第一主動開關元件與該第二主動開關元件之間之一共同節點，而該第一電感之負電壓端係串聯耦接至該電壓型自動電荷抽放電路之半共振電路，該半共振電路包含第二電感以及與該第二電感並聯耦接之第一電容，該電壓型自動電荷抽放電路還包含第二電容串聯耦接至該半共振電路；以及
一變壓器，該變壓器之一次側係耦接至該前端轉換電路，並與該第二電容並聯耦接，該變壓器之二次側係耦接至一後端轉換電路，該後端轉換電路與該前端轉換電路之間係透過該變壓器電性耦接。
於一較佳實施例中，上述變壓器之二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與一個電容構成之全橋整流電路。
於一較佳實施例中，上述變壓器之二次側係耦接至該後端轉換電路，且該後端轉換電路係由二個二極體與二個電容構成之二倍壓整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由二個二極體與與一個電容構成之整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與三個電容構成之三倍壓整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與四個電容構成之四倍壓整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由六個二極體與五個電容構成之五倍壓整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由六個二極體與六個電容構成之六倍壓整流電路。
於另一具體實施例中，本發明所提之全橋式諧振直流轉換器，其包括：
一前端轉換電路，係由一全橋式諧振直流轉換電路及一電壓型自動電荷抽放電路所構成，其中，該全橋式諧振直流轉換電路設有分別自輸入側正電壓端並聯耦接第一主動開關元件及第二主動開關元件，與自輸入側負電壓端並聯耦接第三主動開關元件及第四主動開關元件，其中第一主動開關元件與其串聯耦接至第三主動開關元件係串聯耦接至第一電感之正電壓端，該第一電感之正電壓端係耦接至該第一主動開關元件與該第三主動開關元件之間之一共同節點，而該第一電感之負電壓端係串聯耦接至該電壓型自動電荷抽放電路之半共振電路，該半共振電路包含第二電感以及與該第二電感並聯耦接之第一電容，該電壓型自動電荷抽放電路還包含第二電容串聯耦接至該半共振電路，該第二電容並耦接至該第二主動開關元件與該第四主動開關元件之間之一共同節點；以及
一變壓器，該變壓器之一次側係耦接至該前端轉換電路，並與該第二電容並聯耦接，該變壓器之二次側係耦接至一後端轉換電路，該後端轉換電路與該前端轉換電路之間係透過該變壓器電性耦接。
於一較佳實施例中，上述變壓器之二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與一個電容構成之全橋整流電路。
於一較佳實施例中，上述變壓器之二次側係耦接至該後端轉換電路，且該後端轉換電路係由二個二極體與二個電容構成之二倍壓整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由二個二極體與一個電容構成之整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與三個電容構成之三倍壓整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與四個電容構成之四倍壓整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由六個二極體與五個電容構成之五倍壓整流電路。
於一較佳實施例中，上述變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由六個二極體與六個電容構成之六倍壓整流電路。

The main object of the present invention is to overcome the above problems encountered in the prior art and to provide a DC converter that integrates a flexible cutting technique with a high voltage conversion ratio, which integrates a transformer and combines a full bridge or a half on one side thereof. The bridge type resonant DC conversion circuit and the voltage type automatic charge pumping circuit, through the circuit parameter design and the LC resonance circuit, have variable circuit structure characteristics and active switching soft cutting characteristics, and can control the circuit by adjusting circuit parameters. The converter mode is a boost mode or a buck mode.
A secondary object of the present invention is to provide a double voltage rectifying circuit on the secondary side of the transformer to further increase the output voltage conversion ratio and reduce the output voltage chopping, and further integrate the switching elements of the converter circuit and utilize the automatic changing circuit. Structural features to reduce switching losses and converter circuit conversion circuit efficiency.
Another object of the present invention is to provide a low output voltage chopping, which can avoid the use of a large capacitance electrolytic capacitor to extend the life of the converter to achieve high power density, high voltage conversion ratio, and low cost. Converter circuit for low EMI interference, low output voltage chopping, long life and high conversion efficiency.
To achieve the above objectives, the present invention is a resonant DC converter for converting a DC input voltage to a DC output voltage to supply a load. In a specific embodiment, the half bridge resonant DC converter of the present invention includes:
A front-end conversion circuit is composed of a half-bridge resonant DC conversion circuit and a voltage-type automatic charge pump circuit, wherein the half-bridge resonant DC conversion circuit is provided with a positive voltage terminal from the input side. Connecting the first active switching element and the second active switching element to the positive voltage end of the first inductor, and the positive voltage end of the first inductor is coupled to the first active switching element and the second active switch a common node between the components, wherein the negative voltage terminal of the first inductor is coupled in series to the semi-resonant circuit of the voltage-type automatic charge-distributing circuit, the semi-resonant circuit includes a second inductor and is connected in parallel with the second inductor And coupled to the first capacitor, the voltage type automatic charge pumping circuit further includes a second capacitor coupled in series to the semi-resonant circuit; and a transformer, the primary side of the transformer is coupled to the front end conversion circuit, and The second capacitor is coupled in parallel, and the secondary side of the transformer is coupled to a back end conversion circuit, and the back end conversion circuit and the front end conversion circuit are transmitted through the transformer Coupled.
In a preferred embodiment, the secondary side of the transformer is coupled to the back-end conversion circuit, and the back-end conversion circuit is a full-bridge rectifier circuit composed of four diodes and one capacitor.
In a preferred embodiment, the secondary side of the transformer is coupled to the back end conversion circuit, and the back end conversion circuit is a double voltage rectification circuit composed of two diodes and two capacitors.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of two diodes and a capacitor. Rectifier circuit.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of four diodes and three capacitors. Triple voltage rectifier circuit.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of four diodes and four capacitors. Quadruple voltage rectifier circuit.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of six diodes and five capacitors. Five times voltage rectifier circuit.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of six diodes and six capacitors. Six times voltage rectifier circuit.
In another embodiment, the full bridge resonant DC converter of the present invention includes:
A front-end conversion circuit is composed of a full-bridge resonant DC conversion circuit and a voltage-type automatic charge-discharging circuit, wherein the full-bridge resonant DC conversion circuit is provided with parallel connection from the input side positive voltage terminal respectively. An active switching element and a second active switching element are coupled in parallel with the third active switching element and the fourth active switching element from the input side negative voltage terminal, wherein the first active switching element is coupled in series with the third active switching element The first voltage is coupled to a positive voltage terminal of the first inductor, and the positive voltage terminal of the first inductor is coupled to a common node between the first active switching component and the third active switching component, and the first inductor The negative voltage terminal is coupled in series to the half resonant circuit of the voltage type automatic charge pumping circuit, and the half resonant circuit includes a second inductor and a first capacitor coupled in parallel with the second inductor, the voltage type automatic charge draining The circuit further includes a second capacitor coupled in series to the semi-resonant circuit, the second capacitor being coupled to one of the second active switching element and the fourth active switching element And a transformer, the primary side of the transformer is coupled to the front end conversion circuit, and coupled in parallel with the second capacitor, the secondary side of the transformer is coupled to a back end conversion circuit, the back end conversion The circuit and the front end conversion circuit are electrically coupled through the transformer.
In a preferred embodiment, the secondary side of the transformer is coupled to the back-end conversion circuit, and the back-end conversion circuit is a full-bridge rectifier circuit composed of four diodes and one capacitor.
In a preferred embodiment, the secondary side of the transformer is coupled to the back end conversion circuit, and the back end conversion circuit is a double voltage rectification circuit composed of two diodes and two capacitors.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is rectified by two diodes and a capacitor. Circuit.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of four diodes and three capacitors. Triple voltage rectifier circuit.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of four diodes and four capacitors. Quadruple voltage rectifier circuit.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of six diodes and five capacitors. Five times voltage rectifier circuit.
In a preferred embodiment, the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of six diodes and six capacitors. Six times voltage rectifier circuit.

請參閱『第１Ａ圖～第１Ｇ圖』所示，係本發明半橋式諧振直流轉換器電路之變壓器二次側搭配全橋整流電路示意圖、本發明半橋式諧振直流轉換器電路之變壓器二次側搭配二倍壓整流電路示意圖、本發明半橋式諧振直流轉換器電路之變壓器二次側搭配整流電路示意圖、本發明半橋式諧振直流轉換器電路之變壓器二次側搭配三倍壓整流電路示意圖、本發明半橋式諧振直流轉換器電路之變壓器二次側搭配四倍壓整流電路示意圖、本發明半橋式諧振直流轉換器電路之變壓器二次側搭配五倍壓整流電路示意圖、及本發明半橋式諧振直流轉換器電路之變壓器二次側搭配六倍壓整流電路示意圖。如圖所示：本發明係一種半橋式諧振直流轉換器，用於將一直流輸入電壓轉換為一直流輸出電壓，以為一負載供電，其至少包括一前端轉換電路１以及一變壓器２或２ａ所構成。
該前端轉換電路１係由一半橋式諧振直流轉換電路１１及一電壓型自動電荷抽放電路（Auto Charge Pump Circuit）１２所構成，其中，該半橋式諧振直流轉換電路１１設有自輸入側正電壓端與負電壓端分別連接第一主動開關元件S1 與第二主動開關元件S2 到第一電感L1 之正電壓端，該第一電感L1 之正電壓端係耦接至該第一主動開關元件S1 與該第二主動開關元件S2 之間之一共同節點，而該第一電感L1 之負電壓端係串聯耦接至該電壓型自動電荷抽放電路１２之半共振電路，該半共振電路包含第二電感L2 以及與該第二電感L2 並聯耦接之第一電容C1 ，該電壓型自動電荷抽放電路還包含第二電容C2 串聯耦接至該半共振電路。
該變壓器２或２ａ之一次側係耦接至該前端轉換電路１，並與該第二電容C2 並聯耦接，該變壓器２或２ａ之二次側係耦接至一後端轉換電路，該後端轉換電路與該前端轉換電路１之間係透過該變壓器２或２ａ電性耦接。藉此，構成一全新之半橋式諧振直流轉換器。
上述所提之變壓器２，其二次側耦接之後端轉換電路，係由四個二極體D1 、D2 、D3 及D4 與一個電容CO 構成之全橋整流電路３ａ，如第１Ａ圖所示。
上述所提之變壓器２，其二次側耦接之後端轉換電路，係由二個二極體D1 及D2 與二個電容C3 及C4 構成之二倍壓整流電路３ｂ，如第１Ｂ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由二個二極體D1 及D2 與一個電容CO 構成之整流電路３ｃ，如第１Ｃ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由四個二極體D1 、D2 、D3 及D4 與三個電容CO1 、CO2 及CO3 構成之三倍壓整流電路３ｄ，如第１Ｄ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由四個二極體D1 、D2 、D3 及D4 與四個電容CO1 、CO2 、CO3 及CO4 構成之四倍壓整流電路３ｅ，如第１Ｅ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由六個二極體D1 、D2 、D3 、D4 、D5 及D6 與五個電容CA 、CO1 、CO2 、CO3 及CB 構成之五倍壓整流電路３ｆ，如第１Ｆ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由六個二極體D1 、D2 、D3 、D4 、D5 及D6 與六個電容CA 、CO1 、CO2 、CO3 、CO4 及CB 構成之六倍壓整流電路３ｇ，如第１Ｇ圖所示。
請參閱『第２Ａ圖～第２Ｇ圖』所示，係本發明全橋式諧振直流轉換器電路之變壓器二次側搭配全橋整流電路示意圖、本發明全橋式諧振直流轉換器電路之變壓器二次側搭配二倍壓整流電路示意圖、本發明全橋式諧振直流轉換器電路之變壓器二次側搭配整流電路示意圖、本發明全橋式諧振直流轉換器電路之變壓器二次側搭配三倍壓整流電路示意圖、本發明全橋式諧振直流轉換器電路之變壓器二次側搭配四倍壓整流電路示意圖、本發明全橋式諧振直流轉換器電路之變壓器二次側搭配五倍壓整流電路示意圖、及本發明全橋式諧振直流轉換器電路之變壓器二次側搭配六倍壓整流電路示意圖。如圖所示：本發明係一種全橋式諧振直流轉換器，用於將一直流輸入電壓轉換為一直流輸出電壓，以為一負載供電，其至少包括一前端轉換電路１ａ以及一變壓器２或２ａ所構成。
該前端轉換電路１ａ係由一全橋式諧振直流轉換電路１１ａ及一電壓型自動電荷抽放電路１２ａ所構成，其中，該全橋式諧振直流轉換電路１１ａ設有分別自輸入側正電壓端並聯耦接第一主動開關元件S1 及第二主動開關元件S2 ，與自輸入側負電壓端並聯耦接第三主動開關元件S3 及第四主動開關元件S4 ，其中第一主動開關元件S1 與其串聯耦接至第三主動開關元件S3 係串聯耦接至第一電感L1 之正電壓端，該第一電感L1 之正電壓端係耦接至該第一主動開關元件S1 與該第三主動開關元件S3 之間之一共同節點，而該第一電感L1 之負電壓端係串聯耦接至該電壓型自動電荷抽放電路１２ａ之半共振電路，該半共振電路包含第二電感L2 以及與該第二電感L2 並聯耦接之第一電容C1 ，該電壓型自動電荷抽放電路還包含第二電容C2 串聯耦接至該半共振電路，該第二電容C2 並耦接至該第二主動開關元件S2 與該第四主動開關元件S4 之間之一共同節點。
該變壓器２或２ａ之一次側係耦接至該前端轉換電路１ａ，並與該第二電容C2 並聯耦接，該變壓器２或２ａ之二次側係耦接至一後端轉換電路，該後端轉換電路與該前端轉換電路１ａ之間係透過該變壓器２或２ａ電性耦接。藉此，構成一全新之全橋式諧振直流轉換器。
上述所提之變壓器２，其二次側耦接之後端轉換電路，係由四個二極體D1 、D2 、D3 及D4 與一個電容CO 構成之全橋整流電路３ａ，如第２Ａ圖所示。
上述所提之變壓器２，其二次側耦接之後端轉換電路，係由二個二極體D1 及D2 與二個電容C3 及C4 構成之二倍壓整流電路３ｂ，如第２Ｂ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由二個二極體D1 及D2 與一個電容CO 構成之整流電路３ｃ，如第２Ｃ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由四個二極體D1 、D2 、D3 及D4 與三個電容CO1 、CO2 及CO3 構成之三倍壓整流電路３ｄ，如第２Ｄ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由四個二極體D1 、D2 、D3 及D4 與四個電容CO1 、CO2 、CO3 及CO4 構成之四倍壓整流電路３ｅ，如第２Ｅ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由六個二極體D1 、D2 、D3 、D4 、D5 及D6 與五個電容CA 、CO1 、CO2 、CO3 及CB 構成之五倍壓整流電路３ｆ，如第２Ｆ圖所示。
上述所提之變壓器，係為多繞組變壓器２ａ，其二次側耦接之後端轉換電路，係由六個二極體D1 、D2 、D3 、D4 、D5 及D6 與六個電容CA 、CO1 、CO2 、CO3 、CO4 及CB 構成之六倍壓整流電路３ｇ，如第２Ｇ圖所示。
當運用時，以第１Ｂ圖所示之半橋式諧振直流轉換器電路為例。本發明電路係以四個電容、二個電感、二個二極體以及一個變壓器所構成，當輸入端為半橋式電路架構時，其動作原理為：首先利用第一電感L1 來抑制湧浪電流，接下來透過第二電感L2 並聯第一電容C1 構成半共振電路，再以半共振電路串聯第二電容C2 ，構成串聯諧振並聯負載電路以實現高電壓轉換比之效果。當第二電容C2 之容值與第一電容C1 之容值相近時，電源輸入之能量會分別儲存於第一電容C1 與第二電感L2 構成之半共振電路以及第二電容C2 ，隨著第一電容C1 跨壓快速上升，經由第二電感L2 與第一電容C1 共振，而將第一電容C1 之儲能，轉換成電感電流iL2 ，同時將第一電容C1 跨壓極性反轉，配合第一電感L1 透過諧振作用將輸入能量傳送至第二電容C2 ，進一步提升第二電容C2 上跨壓後，透過變壓器將能量傳送至倍壓電路，當第一電容C1 上反向跨壓大於第二電容C2 與第一電感L1 跨壓之和時將使得開路主動開關元件之飛輪二極體導通後實現柔切技術，同時改變轉換器電路結構。當輸入端為全橋式電路架構時，本發明電路之動作原理與上述原理相似，僅輸出電壓為兩倍於上述電路。第１Ｂ圖電路中之變壓器二次側電路，雖以二倍壓整流電路為例，惟本發明電路並不侷限搭配此二倍壓電路，亦可搭配如第１圖式系列與第２圖式系列所示之其他倍壓整流電路。
本發明電路可透過調整電路參數以控制電路之操作模式，以下說明為以前述第１Ｂ圖所示之半橋式諧振直流轉換器電路工作於升壓模式，且為使本發明電路能工作於最佳操作形式，以下僅就第一、二電感L1 、L2 均操作於電流連續導通模式為例。為方便清楚說明本發明所提出之半橋式諧振直流轉換器電路之工作原理，以下假設所有電路元件均為理想，同時假設其負載為純電阻R。半橋式諧振直流轉換器電路之工作模式敘述如下：

[工作模式一]
請參閱『第３圖』所示，係本發明之諧振直流轉換器於工作模式一之等效電路示意圖。如圖所示：當第一主動開關元件S1 導通而第二主動開關元件S2 截止時，輸入電源Vin 經由第一主動開關元件S1 對儲能電感L1 充電，同時將能量經過L2 C1 共振電路後，傳送至第二電容C2 ，接下來透過變壓器與第二二極體D2 對第三電容C3 與第四電容C4 充電並提供能量至負載，其等效電路如第３圖所示。當第一主動開關元件S1 截止以及第二主動開關元件S2 之飛輪二極體導通時，此時本發明電路即進入工作模式二。

[工作模式二]
請參閱『第４圖』所示，係本發明之諧振直流轉換器於工作模式二之等效電路示意圖。如圖所示：當第一主動開關元件S1 與第二主動開關元件S2 同時截止時，第二電感L2 與第一電容C1 共振，將第一電容C1 之儲能轉換成電感電流iL2 ，並將第一電容C1 跨壓極性反轉，將第二主動開關元件S2 之飛輪二極體導通以改變電路結構。電路中第一電感L1 、第二電容C2 、L2 C1 共振電路與第二主動開關元件S2 之飛輪二極體構成迴路，配合變壓器將儲存能量傳送至二次側，並經過第二二極體D2 對第三電容C3 充電，而第四電容C4 則持續提供能量至負載，其等效電路如第４圖所示，當第二主動開關元件S2 導通時，本發明電路即進入工作模式三。

[工作模式三]
請參閱『第５圖』所示，係本發明之諧振直流轉換器於工作模式三之等效電路示意圖。如圖所示：當第二主動開關元件S2 導通而第一主動開關元件S1 截止時，第一電感L1 、第二電容C2 與L2 C1 共振電路透過變壓器經過第一二極體D1 對第三電容C3 充電，同時第四電容C4 提供能量至負載，其等效電路如第５圖所示。當第二主動開關元件S2 截止以及第一主動開關元件S1 之飛輪二極體導通時，此時本發明電路即進入工作模式四。

[工作模式四]
請參閱『第６圖』所示，係本發明之諧振直流轉換器於工作模式四之等效電路示意圖。如圖所示：當第一主動開關元件S1 與第二主動開關元件S2 同時截止時，第二電感L2 與第一電容C1 共振，將第一電容C1 之儲能轉換成電感電流iL2 ，並將第一電容C1 跨壓極性反轉，將第一主動開關元件S1 之飛輪二極體導通以改變電路結構。電路中第一電感L1 、第二電容C2 、L2 C1 共振電路與第一主動開關元件S1 之飛輪二極體構成迴路，配合變壓器將儲存能量傳送至二次側，經過第一二極體D1 對第三電容C3 充電，同時第四電容C4 提供能量至負載，其等效電路如第６圖所示，當第一主動開關元件S1 導通時，此時本發明電路即進入工作模式一，電路即完成一週期動作。
請參閱『第７圖及第８圖』所示，係分別為本發明諧振直流轉換器之vC1 、vC2 、vO 、iM1 、iM2 、PWM1與PWM2信號之模擬波形一示意圖、及本發明諧振直流轉換器之vC1 、vC2 、vO 、iM1 、iM2 、PWM1與PWM2信號之模擬波形二示意圖。如圖所示：為驗證本發明所提出之諧振直流轉換器之可行性與進步性，使用電路模擬軟體分別模擬轉換器電路工作於升壓與降壓模式時之動作情形，其電路參數則分別如表一與表二所示，其中表一為工作於升壓模式之電路參數，表二為工作於降壓模式之電路參數。如第７、８圖模擬結果所示之vC1 與vC2 為本發明電路中第一電容C1 與第二電容C2 之電容電壓，iM1 ~iM2 為本發明電路中第一主動開關元件S1 與第二主動開關元件S2 之電流，PWM1與PWM2為本發明電路中第一主動開關元件S1 與第二主動開關元件S2 之控制信號，vO 為本發明電路之輸出電壓。
                       表一
Please refer to the "1A to 1G" diagram, which is a schematic diagram of the transformer secondary side of the semi-bridge resonant DC converter circuit with a full bridge rectifier circuit, and the transformer of the half bridge resonant DC converter circuit of the present invention. Schematic diagram of the secondary side with double voltage rectifier circuit, schematic diagram of the transformer secondary side matching rectifier circuit of the half bridge resonant DC converter circuit of the present invention, and the secondary side of the transformer of the half bridge resonant DC converter circuit of the present invention with triple voltage rectification Circuit diagram, schematic diagram of the transformer secondary side of the half bridge resonant DC converter circuit of the present invention with a quadruple voltage rectifier circuit, and a schematic diagram of the transformer secondary side of the half bridge resonant DC converter circuit of the present invention with a voltage doubler rectifier circuit, and The schematic diagram of the secondary side of the transformer of the half bridge resonant DC converter circuit of the present invention is matched with a six-fold voltage rectifier circuit. As shown in the figure: the present invention is a half bridge resonant DC converter for converting a DC input voltage into a DC output voltage to supply a load, which includes at least a front end conversion circuit 1 and a transformer 2 or 2a Composition.
The front end conversion circuit 1 is composed of a half bridge resonant DC conversion circuit 11 and a voltage type automatic charge pump circuit 12, wherein the half bridge resonant DC conversion circuit 11 is provided from the input side. a positive voltage terminal and a negative voltage terminal respectively connected to a first active switching element S 1 and S 2 of the second active switching element to the first positive voltage terminal of the inductor L 1, the first inductor L 1 of the positive voltage terminal is coupled to the system a first node between the first active switching element S 1 and the second active switching element S 2 , and a negative voltage end of the first inductor L 1 is coupled in series to half of the voltage-type automatic charge and discharge circuit 12 a resonant circuit comprising a second inductor L 2 and a first capacitor C 1 coupled in parallel with the second inductor L 2 , the voltage type automatic charge pumping circuit further comprising a second capacitor C 2 coupled in series to The semi-resonant circuit.
The primary side of the transformer 2 or 2a is coupled to the front end conversion circuit 1 and coupled in parallel with the second capacitor C 2 . The secondary side of the transformer 2 or 2 a is coupled to a back end conversion circuit. The back end conversion circuit and the front end conversion circuit 1 are electrically coupled through the transformer 2 or 2a. Thereby, a new half-bridge resonant DC converter is constructed.
The transformer 2 mentioned above has a secondary side coupled to the rear end conversion circuit, and is a full bridge rectifier circuit 3a composed of four diodes D 1 , D 2 , D 3 and D 4 and a capacitor C O , such as Figure 1A shows.
The transformer 2 mentioned above is coupled to the rear end conversion circuit by a secondary side, and is a double voltage rectification circuit 3b composed of two diodes D 1 and D 2 and two capacitors C 3 and C 4 , such as Figure 1B shows.
The transformer mentioned above is a multi-winding transformer 2a, and the secondary side is coupled to the rear end conversion circuit, which is a rectifying circuit 3c composed of two diodes D 1 and D 2 and a capacitor C O , such as the 1C The figure shows.
The transformer mentioned above is a multi-winding transformer 2a, and its secondary side is coupled to a rear-end conversion circuit, which is composed of four diodes D 1 , D 2 , D 3 and D 4 and three capacitors C O1 , C The triple voltage rectifier circuit 3d composed of O2 and C O3 is as shown in FIG. 1D.
The transformer mentioned above is a multi-winding transformer 2a, and its secondary side is coupled to a rear-end conversion circuit, which is composed of four diodes D 1 , D 2 , D 3 and D 4 and four capacitors C O1 , C The quadruple voltage rectifying circuit 3e composed of O2 , C O3 and C O4 is as shown in Fig. 1E.
The transformer mentioned above is a multi-winding transformer 2a, and the secondary side is coupled to a rear-end conversion circuit, which is composed of six diodes D 1 , D 2 , D 3 , D 4 , D 5 and D 6 and 5. A five-fold voltage rectifying circuit 3f composed of capacitors C A , C O1 , C O2 , C O3 and C B is as shown in FIG. 1F.
The transformer mentioned above is a multi-winding transformer 2a, and its secondary side is coupled to a rear-end conversion circuit, which is composed of six diodes D 1 , D 2 , D 3 , D 4 , D 5 and D 6 and six A six-fold voltage rectifying circuit 3g composed of capacitors C A , C O1 , C O2 , C O3 , C O4 and C B is shown in FIG. 1G.
Please refer to the "2A to 2G" diagram, which is a schematic diagram of the transformer secondary side with full bridge rectifier circuit of the full bridge resonant DC converter circuit of the present invention, and the transformer 2 of the full bridge resonant DC converter circuit of the present invention. Schematic diagram of the secondary side with double voltage rectifier circuit, schematic diagram of the transformer secondary side matching rectifier circuit of the full bridge type resonant DC converter circuit of the present invention, and the transformer secondary side of the full bridge type resonant DC converter circuit of the present invention with triple voltage rectification Schematic diagram of the circuit, the schematic diagram of the secondary side of the transformer of the full bridge type resonant DC converter circuit of the present invention, the quadruple voltage rectifier circuit, and the schematic diagram of the transformer secondary side of the full bridge type resonant DC converter circuit with the voltage doubler rectifier circuit, and The schematic diagram of the secondary side of the transformer of the full-bridge resonant DC converter circuit of the present invention is matched with a six-fold voltage rectifier circuit. As shown in the figure: the present invention is a full-bridge resonant DC converter for converting a DC input voltage into a DC output voltage for powering a load, comprising at least a front-end conversion circuit 1a and a transformer 2 or 2a Composition.
The front end conversion circuit 1a is composed of a full bridge type resonant DC conversion circuit 11a and a voltage type automatic charge extraction circuit 12a, wherein the full bridge type resonant DC conversion circuit 11a is provided with a parallel connection from the input side positive voltage terminal. The first active switching element S 1 and the second active switching element S 2 are coupled to the third active switching element S 3 and the fourth active switching element S 4 , wherein the first active switching element is coupled in parallel with the negative voltage terminal from the input side. S 1 in series therewith coupled to the third active switching element. 3 S-based serially coupled to the first positive voltage terminal of the inductor L 1, the first inductor L 1 of the positive voltage terminal is coupled to the first system active switching element S 1 and a common node between the third active switching element S 3 , and the negative voltage terminal of the first inductor L 1 is coupled in series to the semi-resonant circuit of the voltage-type automatic charge-distributing circuit 12 a , the semi-resonance The circuit includes a second inductor L 2 and a first capacitor C 1 coupled in parallel with the second inductor L 2 , the voltage type automatic charge pumping circuit further comprising a second capacitor C 2 coupled in series to the semi-resonant circuit, Second capacitor C 2 is coupled to one common node between the second active switching element S 2 and the fourth active switching element S 4 .
The primary side of the transformer 2 or 2a is coupled to the front end conversion circuit 1a and coupled in parallel with the second capacitor C 2 , and the secondary side of the transformer 2 or 2 a is coupled to a back end conversion circuit. The back end conversion circuit and the front end conversion circuit 1a are electrically coupled through the transformer 2 or 2a. Thereby, a new full-bridge resonant DC converter is constructed.
The transformer 2 mentioned above has a secondary side coupled to the rear end conversion circuit, and is a full bridge rectifier circuit 3a composed of four diodes D 1 , D 2 , D 3 and D 4 and a capacitor C O , such as Figure 2A shows.
The transformer 2 mentioned above is coupled to the rear end conversion circuit by a secondary side, and is a double voltage rectification circuit 3b composed of two diodes D 1 and D 2 and two capacitors C 3 and C 4 , such as Figure 2B shows.
Transformer mentioned above, the system is a multi-winding transformer 2a, which is coupled to the secondary side connection terminal after converting circuit, the two lines. 1 and diode D D and the rectifying circuit 3c constitute a capacitor C O 2, as in the first 2C The figure shows.
The transformer mentioned above is a multi-winding transformer 2a, and its secondary side is coupled to a rear-end conversion circuit, which is composed of four diodes D 1 , D 2 , D 3 and D 4 and three capacitors C O1 , C The triple voltage rectifier circuit 3d composed of O2 and C O3 is as shown in FIG. 2D.
The transformer mentioned above is a multi-winding transformer 2a, and its secondary side is coupled to a rear-end conversion circuit, which is composed of four diodes D 1 , D 2 , D 3 and D 4 and four capacitors C O1 , C The quadruple voltage rectifying circuit 3e composed of O2 , C O3 and C O4 is as shown in Fig. 2E.
The transformer mentioned above is a multi-winding transformer 2a, and the secondary side is coupled to a rear-end conversion circuit, which is composed of six diodes D 1 , D 2 , D 3 , D 4 , D 5 and D 6 and 5. A five-fold voltage rectifying circuit 3f composed of capacitors C A , C O1 , C O2 , C O3 and C B is shown in FIG. 2F.
The transformer mentioned above is a multi-winding transformer 2a, and its secondary side is coupled to a rear-end conversion circuit, which is composed of six diodes D 1 , D 2 , D 3 , D 4 , D 5 and D 6 and six A six-fold voltage rectifying circuit 3g composed of capacitors C A , C O1 , C O2 , C O3 , C O4 and C B is shown in FIG. 2G.
When used, the half-bridge resonant DC converter circuit shown in Fig. 1B is taken as an example. The circuit of the invention is composed of four capacitors, two inductors, two diodes and one transformer. When the input terminal is a half bridge circuit structure, the operation principle is as follows: firstly, the first inductor L 1 is used to suppress the surge. The current is first, and the second capacitor L 2 is connected in parallel with the first capacitor C 1 to form a semi-resonant circuit, and then the second capacitor C 2 is connected in series with the semi-resonant circuit to form a series resonant parallel load circuit to achieve a high voltage conversion ratio. When the capacitance of the second capacitor C 2 is close to the capacitance of the first capacitor C 1 , the energy input to the power source is stored in the semi-resonant circuit and the second capacitor C formed by the first capacitor C 1 and the second inductor L 2 , respectively. 2 , as the first capacitor C 1 rises rapidly across the voltage, resonates with the first capacitor C 1 via the second inductor L 2 , and converts the energy stored by the first capacitor C 1 into the inductor current i L2 , and at the same time voltage across capacitor C polarity inversion. 1, with a first inductor L 1 through the resonance effect of the input energy to the second capacitor C 2, to further improve the voltage across, through the transformer transferring energy to the capacitor C 2 of the second piezoelectric times When the reverse voltage across the first capacitor C 1 is greater than the sum of the voltage across the second capacitor C 2 and the first inductor L 1 , the flywheel diode of the open active switching element is turned on to achieve a flexible cutting technique while changing Converter circuit structure. When the input terminal is a full bridge circuit architecture, the operation principle of the circuit of the present invention is similar to the above principle, and only the output voltage is twice that of the above circuit. In the circuit of the transformer secondary side in the circuit of FIG. 1B, although the double voltage rectification circuit is taken as an example, the circuit of the present invention is not limited to the double voltage circuit, and can also be matched with the first picture series and the second picture. Other voltage doubler rectifier circuits as shown in the series.
The circuit of the present invention can control the operation mode of the circuit by adjusting the circuit parameters. The following description shows that the half bridge resonant DC converter circuit shown in the above FIG. 1B operates in the boost mode, and the circuit of the present invention can operate at the most For the good operation mode, the following is only an example in which the first and second inductors L 1 and L 2 are operated in the continuous current conduction mode. In order to clarify the working principle of the half-bridge resonant DC converter circuit proposed by the present invention, it is assumed that all circuit components are ideal, and the load is assumed to be a pure resistance R. The mode of operation of the half-bridge resonant DC converter circuit is described as follows:

[Work Mode 1]
Please refer to FIG. 3, which is a schematic diagram of an equivalent circuit of the resonant DC converter of the present invention in the operating mode. As shown in the figure: when the first active switching element S 1 is turned on and the second active switching element S 2 is turned off, the input power source V in charges the storage inductor L 1 via the first active switching element S 1 while passing energy through the L After the 2 C 1 resonant circuit is transmitted to the second capacitor C 2 , the third capacitor C 3 and the fourth capacitor C 4 are charged through the transformer and the second diode D 2 to supply energy to the load, and the equivalent circuit thereof As shown in Figure 3. When the first active switching element S 1 is turned off and the flywheel diode of the second active switching element S 2 is turned on, the circuit of the present invention enters the operational mode 2 at this time.

[Working mode 2]
Please refer to FIG. 4, which is an equivalent circuit diagram of the resonant DC converter of the present invention in the operating mode 2. As shown in FIG: When the first active switching element S 1 S 2 a second active switching element is turned off and at the same time, the second inductor L 2 and the first resonance capacitor C 1, to convert the first storage capacitor C 1 to the inductor The current i L2 , and the first capacitor C 1 is inverted across the polarity of the voltage, and the flywheel diode of the second active switching element S 2 is turned on to change the circuit structure. The first inductor L 1 , the second capacitor C 2 , the L 2 C 1 resonant circuit and the flywheel diode of the second active switching element S 2 form a loop, and the stored energy is transmitted to the secondary side by the transformer, and passes through the The diode D 2 charges the third capacitor C 3 , and the fourth capacitor C 4 continues to supply energy to the load. The equivalent circuit is as shown in FIG. 4 , when the second active switching element S 2 is turned on, The invention circuit enters the working mode three.

[Work Mode 3]
Please refer to FIG. 5, which is a schematic diagram of an equivalent circuit of the resonant DC converter of the present invention in the operating mode 3. As shown in the figure: when the second active switching element S 2 is turned on and the first active switching element S 1 is turned off, the first inductor L 1 , the second capacitor C 2 and the L 2 C 1 resonant circuit pass through the transformer through the first diode Body D 1 charges the third capacitor C 3 while the fourth capacitor C 4 supplies energy to the load, the equivalent circuit of which is shown in FIG. When the second active switching element S 2 is turned off and the flywheel diode of the first active switching element S 1 is turned on, the circuit of the present invention enters the operational mode four at this time.

[Work Mode 4]
Please refer to FIG. 6 , which is a schematic diagram of an equivalent circuit of the resonant DC converter of the present invention in operation mode 4. As shown in FIG: When the first active switching element S 1 S 2 a second active switching element is turned off and at the same time, the second inductor L 2 and the first resonance capacitor C 1, to convert the first storage capacitor C 1 to the inductor The current i L2 and the first capacitor C 1 are reversed across the polarity of the voltage, and the flywheel diode of the first active switching element S 1 is turned on to change the circuit structure. The first inductor L 1 , the second capacitor C 2 , and the L 2 C 1 resonant circuit in the circuit form a loop with the flywheel diode of the first active switching element S 1 , and the stored energy is transmitted to the secondary side by the transformer, and passes through the first The diode D 1 charges the third capacitor C 3 while the fourth capacitor C 4 supplies energy to the load, and the equivalent circuit thereof is as shown in FIG. 6 , when the first active switching element S 1 is turned on, the present invention at this time The circuit enters the working mode one, and the circuit completes a cycle of action.
Please refer to FIG. 7 and FIG. 8 respectively, which are schematic diagrams showing the analog waveforms of the signals V C1 , v C2 , v O , i M1 , i M2 , PWM1 and PWM2 of the resonant DC converter of the present invention, and The schematic diagram of the analog waveforms of the signals V C1 , v C2 , v O , i M1 , i M2 , PWM1 and PWM2 of the resonant DC converter of the present invention. As shown in the figure: In order to verify the feasibility and progress of the resonant DC converter proposed by the present invention, the circuit simulation software is used to simulate the operation of the converter circuit when operating in the step-up and step-down modes, respectively, and the circuit parameters are respectively As shown in Table 1 and Table 2, Table 1 is the circuit parameters for the boost mode, and Table 2 is the circuit parameters for the buck mode. As shown in the simulation results of Figures 7 and 8, v C1 and v C2 are the capacitance voltages of the first capacitor C 1 and the second capacitor C 2 in the circuit of the present invention, and i M1 ~ i M2 is the first active switch in the circuit of the present invention. The current of the element S 1 and the second active switching element S 2 , PWM1 and PWM2 are the control signals of the first active switching element S 1 and the second active switching element S 2 in the circuit of the invention, and V O is the output voltage of the circuit of the invention .
Table I


                      表二


由第７圖模擬結果可得到，如前述第１Ｂ圖所示之諧振直流轉換器工作於升壓模式，其輸入電壓為12V，而其輸出電壓為229.25V，其升壓比為19.10，而輸出電壓漣波為0.75。此外，由第７圖模擬結果也可得到，本發明提出之諧振直流轉換器，其開關元件均有柔性切換。此外，由第８圖模擬結果可得到，如前述第１Ｂ圖所示之諧振直流轉換器工作於降壓模式，其輸入電壓為100V，其輸出電壓為2.71V，其降壓比為36.9，而輸出電壓漣波為0.068。此外，由第８圖之模擬結果也可得到，本發明提出之諧振直流轉換器，其開關元件均有柔性切換。
藉此，本發明電路提出之諧振直流轉換器，係透過提高切換頻率與縮小磁性元件體積，以提升轉換器之功率密度與降低成本，其主要電路架構為整合變壓器、倍壓整流電路與電壓型自動電荷抽放電路，搭配全橋式或半橋式諧振直流轉換電路，將電路中諧振元件之第一電感L1 之感值分離部分以作為共振電感L2 ，並將第二電感L2 並聯第一電容C1 構成L2 C1 共振電路，其電路架構如第１Ａ圖～第１Ｇ圖與第２Ａ圖～第２Ｇ圖所示，另外透過參數設計以及LC共振電路作用，使得電路具有可變電路結構特性，配合第二電容C2 構成串聯諧振並聯負載電路以實現高電壓轉換比之效果，此外透過變壓器二次側之倍壓整流電路，可進一步提升輸出電壓轉換比。再者，透過LC共振電路與主動開關元件之整合，可實現柔切技術以降低切換損失與電磁干擾（Electric Magnetic Interruption, EMI）干擾。比較傳統電路之功能、手段及效果，可見本發明電路整合直流轉換器電路之開關元件、利用電壓型自動電荷抽放電路之自動改變電路結構特性，可實現柔切效果、低輸出電壓漣波與高電壓轉換比特性，以達到具有高功率密度、高電壓轉換比、低成本、低EMI干擾、低輸出電壓漣波、長壽命以及高轉換效率之目的。
綜上所述，本發明係一種同時整合柔切技術與高電壓轉換比之諧振直流轉換器，可有效改善習用之種種缺點，本電路整合變壓器、倍壓整流電路與電壓型自動電荷抽放電路（Auto Charge Pump），以及搭配全橋式或半橋式諧振直流轉換電路，並透過電路參數設計與LC共振電路作用，使得電路具有可變電路結構特性，並同時實現柔切效果、低輸出電壓漣波與高電壓轉換比之特性，可避免使用大容值之電解電容而得以延長轉換器之使用壽命，以達到具有高功率密度、高電壓轉換比、低成本、低電磁干擾（Electric Magnetic Interruption, EMI）干擾、低輸出電壓漣波、長壽命以及高轉換效率之目的，此外透過調整電路參數係可控制本發明電路操作於升壓與降壓工作模式，進而使本發明之産生能更進步、更實用、更符合使用者之所須，確已符合發明專利申請之要件，爰依法提出專利申請。
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍；故，凡依本發明申請專利範圍及發明說明書內容所作之簡單的等效變化與修飾，皆應仍屬本發明專利涵蓋之範圍內。
Table II


It can be obtained from the simulation result of FIG. 7 that the resonant DC converter shown in FIG. 1B operates in the boost mode, and its input voltage is 12V, and its output voltage is 229.25V, and its boost ratio is 19.10, and the output is 19.10. The voltage chopping is 0.75. In addition, it can also be obtained from the simulation result of FIG. 7 that the resonant DC converter proposed by the present invention has flexible switching of its switching elements. In addition, as shown in the simulation result of FIG. 8, the resonant DC converter shown in the above FIG. 1B operates in the buck mode, the input voltage is 100V, the output voltage is 2.71V, and the step-down ratio is 36.9. The output voltage ripple is 0.068. In addition, as can be seen from the simulation result of FIG. 8, the resonant DC converter proposed by the present invention has flexible switching of its switching elements.
Therefore, the resonant DC converter proposed by the circuit of the present invention increases the switching frequency and reduces the volume of the magnetic component to increase the power density of the converter and reduce the cost. The main circuit structure is integrated transformer, voltage doubler rectifier circuit and voltage type. An automatic charge pumping circuit, with a full-bridge or half-bridge resonant DC conversion circuit, separates the sensed value of the first inductance L 1 of the resonant component in the circuit as the resonant inductor L 2 , and connects the second inductor L 2 in parallel The first capacitor C 1 constitutes an L 2 C 1 resonant circuit, and its circuit structure is as shown in FIGS. 1A to 1G and 2A to 2G, and the circuit is variable through parameter design and LC resonance circuit function. The circuit structure characteristic, combined with the second capacitor C 2 constitutes a series resonant parallel load circuit to achieve a high voltage conversion ratio effect, and further improves the output voltage conversion ratio through the voltage doubler rectifier circuit on the secondary side of the transformer. Furthermore, through the integration of the LC resonant circuit and the active switching elements, a flexible cutting technique can be implemented to reduce switching losses and electromagnetic interference (EMI) interference. Comparing the functions, means and effects of the conventional circuit, it can be seen that the circuit of the invention integrates the switching elements of the DC converter circuit, and automatically changes the structural characteristics of the circuit by using the voltage type automatic charge pumping circuit, which can realize the soft cutting effect, low output voltage ripple and High voltage conversion ratio characteristics for high power density, high voltage conversion ratio, low cost, low EMI interference, low output voltage chopping, long life and high conversion efficiency.
In summary, the present invention is a resonant DC converter that simultaneously integrates a flexible cutting technique with a high voltage conversion ratio, and can effectively improve various disadvantages of the conventional use. The circuit integrates a transformer, a voltage doubler rectifier circuit, and a voltage type automatic charge pumping circuit. (Auto Charge Pump), and with full-bridge or half-bridge resonant DC conversion circuit, and through the circuit parameter design and LC resonance circuit, the circuit has variable circuit structure characteristics, and at the same time achieve soft cutting effect, low output The characteristics of voltage chopping and high voltage conversion ratio can avoid the use of large capacitance electrolytic capacitors to extend the life of the converter to achieve high power density, high voltage conversion ratio, low cost, and low electromagnetic interference (Electric Magnetic Interruption, EMI) interference, low output voltage chopping, long life and high conversion efficiency. In addition, by adjusting the circuit parameters, the circuit of the present invention can be controlled to operate in the step-up and step-down modes, thereby enabling the generation of the present invention to be more Progressive, more practical, and more in line with the needs of users, indeed meet the requirements of the invention patent application, convert It filed a patent application.
However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; therefore, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the invention are modified. All should remain within the scope of the invention patent.

1、1a．．．前端轉換電路1, 1a. . . Front end conversion circuit

11、11a．．．半橋式諧振直流轉換電路11, 11a. . . Half bridge resonant DC conversion circuit

12、12a．．．電壓型自動電荷抽放電路12, 12a. . . Voltage type automatic charge pumping circuit

2、2a．．．變壓器2, 2a. . . transformer

3a．．．全橋整流電路3a. . . Full bridge rectifier circuit

3b．．．二倍壓整流電路3b. . . Double voltage rectifier circuit

3c．．．整流電路3c. . . Rectifier circuit

3d．．．三倍壓整流電路3d. . . Triple voltage rectifier circuit

3e．．．四倍壓整流電路3e. . . Quadruple voltage rectifier circuit

3f．．．五倍壓整流電路3f. . . Five voltage rectifier circuit

3g．．．六倍壓整流電路3g. . . Six times voltage rectifier circuit

第１Ａ圖，係本發明半橋式諧振直流轉換器電路之變壓器二次側搭配全橋整流電路示意圖。
第１Ｂ圖，係本發明半橋式諧振直流轉換器電路之變壓器二次側搭配二倍壓整流電路示意圖。
第１Ｃ圖，係本發明半橋式諧振直流轉換器電路之變壓器二次側搭配整流電路示意圖。
第１Ｄ圖，係本發明半橋式諧振直流轉換器電路之變壓器二次側搭配三倍壓整流電路示意圖。
第１Ｅ圖，係本發明半橋式諧振直流轉換器電路之變壓器二次側搭配四倍壓整流電路示意圖。
第１Ｆ圖，係本發明半橋式諧振直流轉換器電路之變壓器二次側搭配五倍壓整流電路示意圖。
第１Ｇ圖，係本發明半橋式諧振直流轉換器電路之變壓器二次側搭配六倍壓整流電路示意圖。
第２Ａ圖，係本發明全橋式諧振直流轉換器電路之變壓器二次側搭配全橋整流電路示意圖。
第２Ｂ圖，係本發明全橋式諧振直流轉換器電路之變壓器二次側搭配二倍壓整流電路示意圖。
第２Ｃ圖，係本發明全橋式諧振直流轉換器電路之變壓器二次側搭配整流電路示意圖。
第２Ｄ圖，係本發明全橋式諧振直流轉換器電路之變壓器二次側搭配三倍壓整流電路示意圖。
第２Ｅ圖，係本發明全橋式諧振直流轉換器電路之變壓器二次側搭配四倍壓整流電路示意圖。
第２Ｆ圖，係本發明全橋式諧振直流轉換器電路之變壓器二次側搭配五倍壓整流電路示意圖。
第２Ｇ圖，係本發明全橋式諧振直流轉換器電路之變壓器二次側搭配六倍壓整流電路示意圖。
第３圖，係本發明之諧振直流轉換器於工作模式一之等效電路示意圖。
第４圖，係本發明之諧振直流轉換器於工作模式二之等效電路示意圖。
第５圖，係本發明之諧振直流轉換器於工作模式三之等效電路示意圖。
第６圖，係本發明之諧振直流轉換器於工作模式四之等效電路示意圖。
第７圖，係本發明諧振直流轉換器之vC1 、vC2 、vO 、iM1 、iM2 、PWM1與PWM2信號之模擬波形一示意圖。
第８圖，係本發明諧振直流轉換器之vC1 、vC2 、vO 、iM1 、iM2 、PWM1與PWM2信號之模擬波形二示意圖。
第９圖，係習用之半橋式諧振直流轉換器電路示意圖。

FIG. 1A is a schematic diagram of a transformer secondary side with a full bridge rectifier circuit of the half bridge resonant DC converter circuit of the present invention.
FIG. 1B is a schematic diagram of a secondary side of the transformer with a double voltage rectification circuit of the half bridge resonant DC converter circuit of the present invention.
FIG. 1C is a schematic diagram of a transformer secondary side matching rectifier circuit of the half bridge resonant DC converter circuit of the present invention.
FIG. 1D is a schematic diagram of a transformer secondary side with a triple voltage rectifier circuit of the half bridge resonant DC converter circuit of the present invention.
FIG. 1E is a schematic diagram of a transformer secondary side with a quadruple voltage rectifier circuit of the half bridge resonant DC converter circuit of the present invention.
FIG. 1F is a schematic diagram of a secondary side of a transformer with a five-fold voltage rectifier circuit of the half bridge resonant DC converter circuit of the present invention.
FIG. 1G is a schematic diagram of a secondary side of a transformer with a six-fold voltage rectification circuit of the half-bridge resonant DC converter circuit of the present invention.
2A is a schematic diagram of a transformer secondary side with a full bridge rectifier circuit of the full bridge resonant DC converter circuit of the present invention.
FIG. 2B is a schematic diagram of the secondary side of the transformer with the double voltage rectification circuit of the full bridge resonant DC converter circuit of the present invention.
2C is a schematic diagram of a transformer secondary side matching rectifier circuit of the full bridge resonant DC converter circuit of the present invention.
2D is a schematic diagram of a transformer secondary side with a triple voltage rectification circuit of the full bridge resonant DC converter circuit of the present invention.
FIG. 2E is a schematic diagram of the secondary side of the transformer with the quadruple voltage rectifier circuit of the full bridge resonant DC converter circuit of the present invention.
FIG. 2F is a schematic diagram of a secondary side of the transformer with a five-fold voltage rectification circuit of the full-bridge resonant DC converter circuit of the present invention.
FIG. 2G is a schematic diagram of the secondary side of the transformer with a six-fold voltage rectification circuit of the full-bridge resonant DC converter circuit of the present invention.
Fig. 3 is a schematic diagram showing the equivalent circuit of the resonant DC converter of the present invention in the operating mode.
Fig. 4 is a schematic diagram showing an equivalent circuit of the resonant DC converter of the present invention in operation mode 2.
Fig. 5 is a schematic diagram showing an equivalent circuit of the resonant DC converter of the present invention in the operating mode 3.
Figure 6 is a schematic diagram of an equivalent circuit of the resonant DC converter of the present invention in operation mode 4.
Figure 7 is a schematic diagram showing the analog waveforms of the signals V C1 , v C2 , v O , i M1 , i M2 , PWM1 and PWM2 of the resonant DC converter of the present invention.
Figure 8 is a schematic diagram showing the analog waveforms of the signals V C1 , v C2 , v O , i M1 , i M2 , PWM1 and PWM2 of the resonant DC converter of the present invention.
Figure 9, is a schematic diagram of a conventional half-bridge resonant DC converter circuit.

1．．．前端轉換電路1. . . Front end conversion circuit

11．．．半橋式諧振直流轉換電路11. . . Half bridge resonant DC conversion circuit

12．．．電壓型自動電荷抽放電路12. . . Voltage type automatic charge pumping circuit

2．．．變壓器2. . . transformer

3a．．．全橋整流電路3a. . . Full bridge rectifier circuit

Claims (10)

一種諧振直流轉換器，用於將一直流輸入電壓轉換為一直流輸出電壓，以為一負載供電，其包括：
    一前端轉換電路，係由一半橋式諧振直流轉換電路及一電壓型自動電荷抽放電路（Auto Charge Pump）所構成，其中，該半橋式諧振直流轉換電路設有自輸入側正電壓端與負電壓端分別連接第一主動開關元件與第二主動開關元件到第一電感之正電壓端，該第一電感之正電壓端係耦接至該第一主動開關元件與該第二主動開關元件之間之一共同節點，而該第一電感之負電壓端係串聯耦接至該電壓型自動電荷抽放電路之半共振電路，該半共振電路包含第二電感以及與該第二電感並聯耦接之第一電容，該電壓型自動電荷抽放電路還包含第二電容串聯耦接至該半共振電路；以及
    一變壓器，該變壓器之一次側係耦接至該前端轉換電路，並與該第二電容並聯耦接，該變壓器之二次側係耦接至一後端轉換電路，該後端轉換電路與該前端轉換電路之間係透過該變壓器電性耦接。A resonant DC converter for converting a DC input voltage to a DC output voltage to power a load, comprising:
A front-end conversion circuit is composed of a half-bridge resonant DC conversion circuit and a voltage-type automatic charge pump circuit (Auto Charge Pump), wherein the half-bridge resonant DC conversion circuit is provided with a positive voltage terminal from the input side. The negative voltage terminal is connected to the first active switching component and the second active switching component respectively to the positive voltage terminal of the first inductor, and the positive voltage terminal of the first inductor is coupled to the first active switching component and the second active switching component One of the common nodes, and the negative voltage terminal of the first inductor is coupled in series to the half resonant circuit of the voltage type automatic charge pumping circuit, the half resonant circuit includes a second inductor and is coupled in parallel with the second inductor Connected to the first capacitor, the voltage type automatic charge pumping circuit further includes a second capacitor coupled in series to the semi-resonant circuit; and a transformer, the primary side of the transformer is coupled to the front end conversion circuit, and the first The second capacitor is coupled in parallel, and the secondary side of the transformer is coupled to a back end conversion circuit, and the back end conversion circuit and the front end conversion circuit are electrically connected to the transformer Coupled. 依申請專利範圍第１項所述之諧振直流轉換器，其中，該變壓器之二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與一個電容構成之全橋整流電路。The resonant DC converter of claim 1, wherein the secondary side of the transformer is coupled to the back end conversion circuit, and the back end conversion circuit is composed of four diodes and a capacitor. Full bridge rectifier circuit. 依申請專利範圍第１項所述之諧振直流轉換器，其中，該變壓器之二次側係耦接至該後端轉換電路，且該後端轉換電路係由二個二極體與二個電容構成之二倍壓整流電路。The resonant DC converter of claim 1, wherein the secondary side of the transformer is coupled to the back end conversion circuit, and the back end conversion circuit is composed of two diodes and two capacitors. A double voltage rectifier circuit is constructed. 依申請專利範圍第１項所述之諧振直流轉換器，其中，該變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由二個二極體與與一個電容構成之整流電路。The resonant DC converter according to claim 1, wherein the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of two A diode and a rectifier circuit formed with a capacitor. 依申請專利範圍第１項所述之諧振直流轉換器，其中，該變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與三個電容構成之三倍壓整流電路。The resonant DC converter of claim 1, wherein the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is four A triple voltage rectifier circuit composed of a diode and three capacitors. 依申請專利範圍第１項所述之諧振直流轉換器，其中，該變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與四個電容構成之四倍壓整流電路。The resonant DC converter of claim 1, wherein the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is four A quadruple voltage rectifier circuit composed of a diode and four capacitors. 依申請專利範圍第１項所述之諧振直流轉換器，其中，該變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由六個二極體與五個電容構成之五倍壓整流電路。The resonant DC converter according to claim 1, wherein the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of six A five-fold voltage rectifier circuit composed of a diode and five capacitors. 依申請專利範圍第１項所述之諧振直流轉換器，其中，該變壓器係為多繞組變壓器，於其二次側係耦接至該後端轉換電路，且該後端轉換電路係由六個二極體與六個電容構成之六倍壓整流電路。The resonant DC converter according to claim 1, wherein the transformer is a multi-winding transformer coupled to the back-end conversion circuit on a secondary side thereof, and the back-end conversion circuit is composed of six A six-fold voltage rectifier circuit composed of a diode and six capacitors. 一種諧振直流轉換器，用於將一直流輸入電壓轉換為一直流輸出電壓，以為一負載供電，其包括：
     一前端轉換電路，係由一全橋式諧振直流轉換電路及一電壓型自動電荷抽放電路所構成，其中，該全橋式諧振直流轉換電路設有分別自輸入側正電壓端並聯耦接第一主動開關元件及第二主動開關元件，與自輸入側負電壓端並聯耦接第三主動開關元件及第四主動開關元件，其中第一主動開關元件與其串聯耦接至第三主動開關元件係串聯耦接至第一電感之正電壓端，該第一電感之正電壓端係耦接至該第一主動開關元件與該第三主動開關元件之間之一共同節點，而該第一電感之負電壓端係串聯耦接至該電壓型自動電荷抽放電路之半共振電路，該半共振電路包含第二電感以及與該第二電感並聯耦接之第一電容，該電壓型自動電荷抽放電路還包含第二電容串聯耦接至該半共振電路，該第二電容並耦接至該第二主動開關元件與該第四主動開關元件之間之一共同節點；以及
     一變壓器，該變壓器之一次側係耦接至該前端轉換電路，並與該第二電容並聯耦接，該變壓器之二次側係耦接至一後端轉換電路，該後端轉換電路與該前端轉換電路之間係透過該變壓器電性耦接。A resonant DC converter for converting a DC input voltage to a DC output voltage to power a load, comprising:
A front-end conversion circuit is composed of a full-bridge resonant DC conversion circuit and a voltage-type automatic charge-discharging circuit, wherein the full-bridge resonant DC conversion circuit is provided with parallel connection from the input side positive voltage terminal respectively. An active switching element and a second active switching element are coupled in parallel with the third active switching element and the fourth active switching element from the input side negative voltage terminal, wherein the first active switching element is coupled in series with the third active switching element The first voltage is coupled to a positive voltage terminal of the first inductor, and the positive voltage terminal of the first inductor is coupled to a common node between the first active switching component and the third active switching component, and the first inductor The negative voltage terminal is coupled in series to the half resonant circuit of the voltage type automatic charge pumping circuit, and the half resonant circuit includes a second inductor and a first capacitor coupled in parallel with the second inductor, the voltage type automatic charge draining The circuit further includes a second capacitor coupled in series to the semi-resonant circuit, the second capacitor being coupled to one of the second active switching element and the fourth active switching element And a transformer, the primary side of the transformer is coupled to the front end conversion circuit, and coupled in parallel with the second capacitor, the secondary side of the transformer is coupled to a back end conversion circuit, the back end conversion The circuit and the front end conversion circuit are electrically coupled through the transformer. 依申請專利範圍第９項所述之諧振直流轉換器，其中，該變壓器之二次側係耦接至該後端轉換電路，且該後端轉換電路係由四個二極體與一個電容構成之全橋整流電路。The resonant DC converter of claim 9, wherein the secondary side of the transformer is coupled to the back end conversion circuit, and the back end conversion circuit is composed of four diodes and a capacitor. Full bridge rectifier circuit.
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